Unrepentant Sin

From publisher blurb: Unrepentant Sin is a 5th Edition adventure for 3-7 characters of 6th-level and is optimized for four characters with an average party level (APL) of 6. This adventure sees the party investigating a series of strange deaths in the City of Hilne. Hilne is a city of two parts. Floating a thousand feet above the ground is the Upper City, home to the rich nobility and their servants. Shackled to the Upper City by means of three gigantic chains, the Lower City is held within the constant gloom of the floating City's shadow. Now a cult of madmen seek to break those chains. Will you stop them?